Patent US5100600A successfully refreshed from Google Patents.
US5100600A
Expired / Lapsed
US
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Method of making an absorbent paper-containing granulate
Assignee: Individual
•
Filing: 1990-12-07
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Granted: 1992-03-31
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Expires: 2010-12-07
Abstract
Abstract A method of making an absorbent granulate of paper, with or without additives, includes mechanically comminuting paper into irregular and/or strip-shaped fragments, crumpling and interlacing the fragments with attendant development of internal spaces (cavities) in the interlaced and crumpled fragments, rough pressing the interlaced and crumpled fragments into prepressed formations (e.g., into tubes having a diameter of up to or even in excess of 10 mm), and converting the prepresssed formations into particles, particularly into granules or pellets. The crumpling and interlacing step can include agitating the fragments in one or more streams of a gaseous fluid and/or kneading the fragments. The additives can be admixed during at least one of the comminuting, crumpling and interlacing, rough pressing and converting steps and can include substances which reduce the specific weight of granules, substances which alter the magnetic and/or electrostatic properties of the mixture of fragments and additives, aromatic substances, deodorants, disinfectants or materials which influence the wettability of paper. Up to 20 percent by weight of water can be added to paper in the course of at least one of the comminuting, crumpling and interlacing, rough pressing and converting steps. The granulate can be used as litter or as an oil binding material.
Inventors
- 👤 Fritz Keller
- 👤 Elisabeth Mullhaupt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 20:49
CPC Classifications
A; A01; A01K; A01K1/00; A01K1/015; A01K1/0152; A01K1/0155; B; B01; B01J; B01J20/00
Claims Analysis
Total Claims: 31
Claim 1
Independent Claim
52 words
A method of making an absorbent granulate of paper, comprising the steps of mechanically comminuting paper into fragments; crumpling and interlacing the fragments with attendant development of internal spaces in the interlaced and crumpled fragments; rough pressing the interlaced and crumpled fragments into prepressed formations; and converting the prepressed formations into granules.
Claim 2
Independent Claim
52 words
A method of making an absorbent granulate of paper, comprising the steps of mechanically comminuting paper into fragments; crumpling and interlacing the fragments with attendant development of internal spaces in the interlaced and crumpled fragments; rough pressing the interlaced and crumpled fragments into prepressed formations; and converting the prepressed formations into granules.
Claim 3
Dependent Claim
19 words
The method of claim 1, wherein said step of mechanically comminuting comprises shredding paper into irregular and/or strip-shaped fragments.
Claim 4
Dependent Claim
15 words
The method of claim 1, wherein said step of mechanically comminuting comprises severing paper sheets.
Claim 5
Dependent Claim
26 words
The method of claim 1, wherein said rough pressing step includes converting interlaced and crumpled fragments into tubular bodies with a diameter of approximately 10 mm.
Claim 6
Dependent Claim
25 words
The method of claim 1, wherein said converting step includes forcing the prepressed formations through a matrix having interstices in the range of 1-10 mm.
Claim 7
Dependent Claim
21 words
The method of claim 1, wherein said crumpling and interlacing step comprises agitating the fragments in a stream of gaseous fluid.
Claim 8
Dependent Claim
15 words
The method of claim 1, wherein said crumpling and interlacing step comprises kneading the fragments.
Claim 9
Dependent Claim
30 words
The method of claim 1, further comprising the step of admixing additives in the course of at least one of said comminuting, crumpling and interlacing, rough pressing and converting steps.
Claim 10
Dependent Claim
19 words
The method of claim 8, wherein said admixing step includes admitting additives which reduce the specific weight of granules.
Claim 11
Dependent Claim
27 words
The method of claim 9, wherein said weight reducing additives are selected from the group consisting of porous fillers, polystyrene foam, polyurethane foam, microglass beads and wood.
Claim 12
Dependent Claim
25 words
The method of claim 8, wherein said additives include weight reducing additives which alter the magnetic properties of the mixture of paper and said additives.
Claim 13
Dependent Claim
25 words
The method of claim 8, wherein said additives include weight reducing additives which alter the electrostatic properties of the mixture of paper and said additives.
Claim 14
Dependent Claim
11 words
The method of claim 8, wherein said additives include aromatic substances.
Claim 15
Dependent Claim
23 words
The method of claim 13, wherein said aromatic substances are selected from the group consisting of natural and synthetic essences and perfume oils.
Claim 16
Dependent Claim
10 words
The method of claim 8, wherein said additives include deodorants.
Claim 17
Dependent Claim
22 words
The method of claim 15, wherein said deodorants are selected from the group consisting of chlorophyl, activated carbon, zinc ricinoleates and enzymes.
Claim 18
Dependent Claim
10 words
The method of claim 8, wherein said additives include disinfectants.
Claim 19
Dependent Claim
24 words
The method of claim 17, wherein said disinfectants are selected from the group consisting of reducing and oxidizing compounds, cationic tensides, amphotensides and alcohols.
Claim 20
Dependent Claim
16 words
The method of claim 8, wherein said additives include substances which influence the wettability of paper.
Claim 21
Dependent Claim
22 words
The method of claim 19, wherein said substances are selected from the group consisting of anionic and non-anionic tensides, polymers and oligomers.
Claim 22
Dependent Claim
18 words
The method of claim 1, wherein said rough pressing step is carried out in a flat bed press.
Claim 23
Dependent Claim
18 words
The method of claim 1, wherein said converting step is carried out in an annular matrix molding press.
Claim 24
Dependent Claim
30 words
The method of claim 1, further comprising the step of adding water in the course of at least one of said comminuting crumpling and interlacing, rough pressing and converting steps.
Claim 25
Dependent Claim
23 words
The method of claim 23, wherein said adding step includes adding water in quantities of up to 20 percent by weight of paper.
Claim 26
Dependent Claim
12 words
The method of claim 1, wherein said granules constitute particles of litter.
Claim 27
Dependent Claim
12 words
The method of claim 1, wherein said granules constitute oil binding material.
Claim 28
Dependent Claim
13 words
The method of claim 1, further comprising the step of coating the granules.
Claim 29
Dependent Claim
19 words
The method of claim 27, wherein said coating step comprises applying to the granules coats containing a clayey material.
Claim 30
Dependent Claim
25 words
The method of claim 27, wherein said coating step comprises applying to the granules a material selected from the group consisting of bentonite and chalk.
Claim 31
Dependent Claim
25 words
The method of claim 1, wherein said converting step includes forcing the prepressed formations through a matrix having interstices in the range of 3-6 mm.
References Cited (Backward Citations)
US3821346A
Cited
US3972971A
Cited
US4341180A
Cited
US4263873A
Cited
US4378756A
Cited
US4374794A
Cited
CA1172025A
Cited
US4409925A
Cited
JPS58111625A
Cited
US4532890A
Cited
EP0121055A2
Cited
NL8304094A
Cited
US4560527A
Cited
US4621011A
Cited
US4676196A
Cited
US4570573A
Cited
US4607594A
Cited
US4721059A
Cited
FR2618641A1
Cited
US4924808A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-03-31 | 1995-09-30 | 1996-03-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-03-31 | 1999-09-30 | 2000-03-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-03-31 | 2003-09-30 | 2004-03-31 | $7700.00 | Window Closed / Lapsed |